CTS: Refactor VM-tests naming

Strip the JUnit_ prefix from host tests. Strip the last package
component if it is already encoded in the test name.

Bug: 79362653
Test: m cts
Test: cts-tradefed run cts -m vm-tests-tf
Change-Id: I26d41ebdb2673cccc5d0c00ae96af8a95f789b85
1 file changed